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This is the factory Takeuchi workshop manual (publication WE3-301E2) for the TB025, TB030 and TB035 compact excavators. It covers machines built on the Yanmar 3TN84L-RTBZ, 3TN84TL-RTBZ and 3TN84TL-RTBY engines, with serial numbers starting at TB025 1253001, TB030 1303001 and TB035 1353001.Across 362 pages you get disassembly and reassembly procedures, full machine configuration (drive, slew, travel, upper frame, control, hydraulic and electrical systems), and detailed hydraulic unit work: pump, control valve, pilot valve, cylinders, and the travel and slew motors. The specifications section lists dimensions, fluid capacities, servicing standards and tightening torques, and a dedicated troubleshooting section walks you through no-power and slow-operation faults.The manual is a downloadable PDF with a searchable text layer and bookmarks, so you can print any page or jump straight to the system you are repairing.
What's Inside This Takeuchi TB025, TB030, TB035 Manual
| System | Pages | Key Topics |
|---|---|---|
| Front Matter | 1-4 | Compact Excavator, Workshop Manual, Serial Number, Takeuchi Mfg. Co., Ltd., Foreword, Machine Front and Rear, Left and Right |
| General | 5-16 | Cautions During Disassembly and Assembly, Cautions During Removal and Installation of the Hydraulic Units, Cautions During Removal and Installation of Piping, Handling of Seals |
| Specifications | 17-68 | Names of Components, Dimensions, Lifting Capacities, Weights, Fluid Capacities, Recommended Lubricants, Types of Crawler Belts |
| Machine Configuration | 69-136 | External View, Drive System, Slew System, Travel System, Upper Frame, Control System, Attachments, Hydraulic System |
| Hydraulic Units | 137-304 | Hydraulic Pump [TB025, TB030], Hydraulic Pump [TB035], Control Valve, Pilot Valve, Cylinder, Travel Motor, Slew Motor |
| Troubleshooting | 305-362 | Overall Machine (No Operations CAN Be Done, All Operations CAN Be Done, But There Is No Power, Boom, Bucket, Slew and Arm Do Not Move at All, Or the Speed Is Low) |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| All Models | ||
| Cushion Rubber Installation Nut Tightening Torque | 9.9 kgfm | p. 82 |
| Return Filter Nominal | 10 u | p. 125 |
| Hydraulic Hoses Union Nut (PF) 1/8 size torque | 1.0 +0.5 kgf-m | p. 14 |
| Track Roller Outer Dia. of Tread (Basic Dimension) | 93 ±0.5 mm | p. 50 |
| Idler Outer Dia. of Tread (Steel Crawler Basic Dimension) | 305 mm | p. 52 |
| Sprocket Outer Diameter (Basic Dimension) | 385.6 mm | p. 51 |
| Engine Oil Capacity (Upper Limit) | 4.7 L | p. 41 |
| Engine Cooling System Capacity | 5 L | p. 41 |
| Hydraulic Oil Service Interval | Every 1,000 hours | p. 42 |
| General Tightening Torque (M10 x 1.5) | 47.1 N-m | p. 16 |
| TB025 | ||
| Hydraulic Oil Tank Capacity | 69 L | p. 41 |
| TB030, TB035 | ||
| Fuel Tank Capacity | 34 L | p. 41 |
Takeuchi TB025, TB030, TB035 Common Problems This Manual Covers
Slow or weak hydraulic response
Owners often report boom, bucket, slew and arm movements getting slow or losing power, especially after the oil warms up. The troubleshooting section diagnoses these no-power and low-speed symptoms system by system.
Manual Section: V . Troubleshooting p. 305Hydraulic pump wear and cavitation
A worn or cavitating hydraulic pump shows up as reduced flow and sluggish operation across all functions. The hydraulic units section covers pump, control valve and pilot valve disassembly and rebuild.
Manual Section: Iv . Hydraulic Units p. 137Undercarriage wear parts
Track rollers, idlers and sprockets are frequent replacement items on these excavators. The specifications section gives the basic tread dimensions and servicing standards used to judge when they are worn out.
Manual Section: Ii . Specifications p. 17Starting and electrical faults
Machines that will not start or crank inconsistently are a recurring repair topic, tied to the starter circuit, wiring or relays. The machine configuration section documents the electrical system layout.
Manual Section: Iii . Machine Configuration p. 69Travel pulls to one side
When one track is weak or the machine pulls while tracking straight, a worn travel motor is a common cause. The hydraulic units section covers the travel motor with parking brake, including its seals.
Manual Section: Iv . Hydraulic Units p. 137Hydraulic oil overheating
Abnormally rising hydraulic oil temperature usually points to low fluid level, a clogged filter or pump inefficiency. Use the troubleshooting section to isolate the cause before further damage occurs.
Manual Section: V . Troubleshooting p. 305Frequently Asked Questions
Which machines does this manual cover?
It is the Takeuchi workshop manual for the TB025, TB030 and TB035 compact excavators, serial numbers from TB025 1253001, TB030 1303001 and TB035 1353001, with Yanmar 3TN84L-RTBZ, 3TN84TL-RTBZ and 3TN84TL-RTBY engines.
Where do I find tightening torque specifications?
The General section covers standard tightening torques for piping and bolts, including the general values you apply during reassembly. Look there before torquing any fasteners on the machine. p. 5
Does it cover rebuilding the hydraulic pump and travel motor?
Yes. The Hydraulic Units section details the hydraulic pump, control valve, pilot valve, cylinders, travel motor and slew motor, with disassembly, inspection and reassembly steps for each unit. p. 137
Will it help me diagnose no-power or slow operation?
Yes. The Troubleshooting section works through symptoms like no operations, all operations working but no power, and slow or dead boom, bucket, slew and arm movement, pointing you to the likely cause. p. 305
How quickly can I access this Takeuchi TB025, TB030, TB035 manual after buying?
Immediate download of the complete 362-page searchable WORKSHOP MANUAL. Open it on any device, whether that is the laptop at your desk or the phone in the field.
Can I print specific sections of this Takeuchi TB025, TB030, TB035 manual?
Yes. The PDF carries no DRM restrictions, so you can print any page or section your shop needs. It works with any standard printer.
Can I find hydraulic circuit diagrams in this Takeuchi TB025, TB030, TB035?
Yes. The manual includes hydraulic circuit diagrams, system schematics, and component specifications with pressure ratings.
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